After mounting a recovery point, you are unable to access it due to a lack of proper security permissions.
This is the result of Windows Explorer not granting true Administrator rights to specific files or folders. Microsoft included this feature in Windows Server 2012 as an additional layer of security for the overall system.
There are two potential resolutions to this problem.
Complete the following steps.
You have the second option of using alternative browsers, such as:
If the problem persists even using an alternative browser consider running the recommended steps on the KB article "How to address NTFS errors on mounted Recovery Points "